超高强大体积混凝土水化热温度效应的数值分析

杨得坡; 陈荣昌; 杨锐; 张耀庭

doi:10.3724/j.gyjzG24043004

超高强大体积混凝土水化热温度效应的数值分析

doi: 10.3724/j.gyjzG24043004

1. 华中科技大学土木与水利工程学院, 武汉 430074;
2. 武汉建工集团股份有限公司, 武汉 430090

基金项目:

国家自然科学基金项目(52178140)。

详细信息

作者简介:
杨得坡,硕士研究生,主要从事高性能混凝土的结构应用研究。电子信箱:m202271400@hust.edu.cn

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出版历程
- 收稿日期: 2024-04-30
- 网络出版日期: 2025-04-02

Analysis of Time-Varying Temperature Effect of Hydration Heat of Ultra-High Strength Mass Concrete

1. School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;
2. Wuhan Construction Engineering Group Co., Ltd., Wuhan 430090, China

摘要

摘要: 为研究超高强大体积混凝土水化热时变温度效应,以迪拜河某高塔的锚固基础为依托,建立有限元模型进行分析。通过仿真模拟,得到超高强混凝土(C90/105)水化热温度分布特征,并优化管冷系统进行温度控制。在此基础上,分别改变混凝土入模温度和冷水管进水温度,多方面研究超高强混凝土水化热时变温度效应。结果表明:结构表面温度峰值、内部温度峰值和内表温差与混凝土入模温度近似成正线性相关,且入模温度每降低5℃,混凝土结构内表最大温差平均降低约2℃;冷水管进水温度每降低5℃,混凝土结构内表最大温差平均降低约5℃。然而,当进水温度严重低于混凝土入模温度时,结构内部温度甚至可能低于结构表面。实际工程中,应当综合考虑温控要求和资源利用等对超高强混凝土结构和管冷系统进行合理设计。
- 超高强混凝土 /
- 大体积混凝土 /
- 水化热 /
- 管冷 /
- 入模温度 /
- 管冷进水温度
Abstract: In order to study the time-varying temperature effect of hydration heat of ultra-high strength mass concrete, a finite element model was established based on the anchor foundation of a high tower of Dubai River. Through simulations, the characteristics of temperature distribution of hydration heat of ultra-high strength concrete (C90/105) were obtained, and the pipe cooling system was optimized for temperature control. On this basis, the time-varying temperature effect of hydration heat of ultra-high strength concrete was studied by changing the concrete pouring temperature and the inlet temperature of pipe cooling. The results indicated that the peak surface temperature, the peak internal temperature, and temperature difference between the interior and the surface of the structure were approximately positively correlated with the concrete pouring temperature, and for each 5 ℃ decrease in the pouring temperature, the average maximum temperature difference between the interior and the surface of the concrete structure decreased by approximately 2 ℃. For each 5 ℃ decrease in the inlet temperature of pipe cooling, the average maximum temperature difference between the interior and the surface of the concrete structure diminished by approximately 5 ℃. However, if the inlet temperature was substantially lower than the concrete pouring temperature, the internal temperature of the structure might become lower than the surface temperature. In practical engineering, the reasonable design of ultra-high strength concrete structure and pipe cooling system should be taken into account the requirements of temperature control and resource utilization.
- ultra-high strength concrete /
- mass concrete /
- hydration heat /
- pipe cooling system /
- concrete pouring temperature /
- inlet temperature of pipe cooling

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